Printing-telegraph receiver



C. G. ASHLEY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION MEDIUM/8.1912. RENEWED IAN. 3. I9I6.

1 11 9 3., l Patented Aug. 1, 1916.

7 7l N U FIG-.7. 57.4

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IINITEU NATM@ PATENT OFFIE.

CHARLES G. ASHLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO GENERAL ENGINEERING AND CONSTRUCTION COMPANY, LIMITED, OF TORONTO, CANADA, A CORPORATION OF ONTARIO, CANADA.

PRINTING-TELEGRAPH RECEIVER.

Specification of Letters Patent. patentiert Aug. 1, 1916.

Application filed July 8, 1912, Serial No. 708,166. Renewed January 3, 1916. Serial No. 70,077.

To all whom t may concern Be it known that I, CHARLES G. ASHLEY, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in Printing-Telegraph Receivers, of which the following is a specification.

My invention relates to automatic printing telegraph systems of the class using printed characters, which from the nature of their making, may be termed composite characters, and embodies a novel and improved form of receiver for use with such systems.

It is with a view toward obtaining infallibility and maximum e'liiciency of operation through simplied co-nstruction and increased sensitiveness of mechanism that my invention is directed.

Further objects to my invention consist in simplifying the manufacture and minimizing the maintenance and adjustments. These and other desirable features which will subsequently be disclosed herein, I accomplish by employing a permanent magnetic field which normally maintains in a normal position, a series of armatures bearing type faces and thus holds the type faces out of contact with a receiving surface, and by employing further means of creatingv adjacent to any selected armature, a magnetic field at substantially a right angle to the polarizing field to cause the armature to attempt to assume a position coincident with the field resultant from the two fields acting thereon, to imprint upon the receiving surface the type face borne by the armature.

In the figures which accompany and form a part of this specification and in which like numerals designate corresponding throughout: Figure l illustrates in diagram a simple form of transmitter, my improved receiver and the conductorsl connecting them. F ig. 2 is a side elevation of my receiver. Fig. 3 is a sectional view of the same taken on the line A-A of Fig. 2. Fig. 4 is an enlarged view of a detail. Fig. 5 is a section of transmitting tape. Fig. 6 illustrates the outline of preferred forms of characters and numerals as printed by my receiver.

While I have represented at the left of Fig. l diagram a simple form. of trans? p arts mitter, my improvedreceiver is adaptable to use with any type of transmitting mecha n ism, provided it is adapted to impress selectively upon the coils of the receiver, current impulses o-f variant polarity. The transmitter shown comprises two direct current dynamos 2,1 and 22 or otherl convenient source of current, their terminals of opposite polarity being connected 'together and to ground 28 while the positive terminal of dynamo 22 is connected to brushes 5 and 7 and the negative terminal of dynamo 2l is connectedto brushes 6 and 8. A brush 9 is connected to line conductor l1 and is of sufiicient width to bear upon both brushes 5 and 6 and make Contact therewith, while brush 10 is connected to line conductor 12 and is of sufficient width to bear upon brushes 7 and 8 and make contact therewith. Brushes 9 and 10 are however, normally held out of contact with their respective pairs of brushesv 5, 6 and 7, 8 by means of a transmitting tape 24C through perforations in which contact may be selectively made between any brush of a pair of brushes as 5 and 6 with their respective line brush as 9 to send selectively over either line conductor 1l or 12 and ground, positive or negative impulses required. The transmitting mechanism thus constitutes a simple means for selectively transmitting to the receiver coils current impulses of variant polarity.

My improved receiver, the line connections of which are indicated in diagram at the right of Fig.` 1 and the mechanism in more detail in Figs. 2, 3 and 1l, comprises a permanent magnet of the form shown in Fig. 2. A series of bell-crank-shaped armatures l", 20, 30 and 41:0 which may be formed of either iron or steel are pivoted by means of a pin 27 in a series of slots as 272 in one pole face of the permanent magnet 27. The other pole face of the permanent magnet is beveled to an edge which is parallel to the pin 27 supporting the armatures 10, 20, 3 and 40, while each of the extremities of the arms of the armatures that extend substantially across the air gap of the permanent magnet are likewise beveled. A printing type as l', 22., 3 and 114 is borne as an integral part thereofupon each extremity of the extended portions of the armatures l", 2, 30 and 4:0 respectively and the extended portions or @FWS @f 11?@ armature are bent to bring their respective type faces` into such relation to each other as to form the printing symbol shown in Fig. 3 or as shown greatly enlarged in Fig. 4. An anvil 28 is placed adjacent to all of the printing types and is adjustable in its distance therefrom by means of a screw 29. A receiving tape 30 rests on the surface of the anvil 28 and may be drawn longitudinally between the anvil and the printing types by any desired means. A. strip of impression or carbon paper 30 is maintained between the printing types and the receiving tape 30 and allows of recording the impressions of the types upon the receiving tape.

Thefbeveled pole face of the permanent magnet and the pointed extremities of the armatures serve to concentrate the magnetic iinx across the air gap between the magnet 27 and the armatures, into substantially a line which lies on the axis of rotation of the armatures, thus tending to maintain a definite normal position for all of the armatures, which restrains the type faces which they bear from contact with the impression paper 30. y

A pair of electromagnets (1 and 2) and (3 and 4) are provided with pole pieces as 261, 262, 263 and 26A1 which extend slightly beyond the heads of the magnets and'are rigidly attached to their respective cores by the screws 251, 252, 25j3 and 254 respec` tively. The extended portions of the pole pieces pass through and are rigidly held in a brass apron 24 which is in turn attached by means of screws as 241, to the permanent magnet 27, as indicated. The pole pieces are so spaced in the apron 24 and the apron is so placed on the permanent magnet that each pole piece as 261, 262, 263 and 261 is maintained opposite and slightly removed from its respective printing armature as 1, 20, 30 and 4", thus they are so positioned as to produce adjacent to their associated printing armature, when energized, a magnetic iield which is substantially at right angles to the polarizing ield produced by the polarizingmagnet.

Referring now especially to Fig. .1 the electromagnet (1 and 2) has its helix connected in series with line conductor 11 and ground 19 while electromagnet (3 and 4) has its helix connected in series with line conductor 12 and ground 19. Electromagnet (1 and 2) is so wound that when energized by a positive current impulse traversing line conductor 11 and ground, a N. magnet pole is induced on its pole piece 261 and a S. magnetic pole on its pole piece 262. When, however, the helix of the velectromagnet is. energized by an impulse in the oppo` site direction, the magnetic poles on its pole pieces 261and 262 are reversed. Similarly a positive impulse of current traversing line conductor 12, electromagnet (3 and 4) and ground induces upon pole pieces 263 a N. magnetic pole and upon pole piece 264 a S. magnetic pole, while a curernt impulse through the helix in the opposite direction reverses these polarities. The polarizing magnet 27 induces upon each of the pointed extremities of the armatures, 12, 2", 3 and 40 a S. magnetic pole and thus normally maintains all of the armatures in a position which restrains the type faces 11, 22, 32, and 41 from contact with the impression paper 301. If now a positive impulse of current be transmitted over line conductor 11, through electromagnet (1 and 2) to ground a N. magnetic pole will be induced on pole piece 261 opposite armature 1o which instantly moves from its normal position and attempts to assume a position coincident with the resultant field of the polarizing and newly created attracting electromagnetic field, and as the anvil 28 is so adjusted that the type face 11 borne on the extremity of armature 10 strikes the impression paper 301 before armature 1" strikes the 26 in attempting to reach a position in the resultant field, a record of type face 11 is recorded on the receiving tape 30. This same impulse which energizes electromagnet (1 and 2) .likewise produces a S. magnetic pole on pole pieces 262 and as armature 20 is opposite this pole face, it assumes a position coincident with the field resultant from the polarizing and newly created repelling field which serves to rotate armature 2o to increase the distance between the type face which it bears or 22, and the impression paper 301 and a record of the type face is not made on the receiving tape.

In a similar manner a negative impulse of current traversing line conductor 11 elec* tromagnet (1 and 2) and ground induces a S. magnetic pole on pole face 261 and a N. magnetic pole on pole face 262 which operates armature 2" to imprint type face 22 and restrains type face 11 from contact with the impression paper. In like manner a positive impulse of current over line conductor 1.2 through electromagnet (3 and 4) to ground, imprints type face 31 while a negative impulse of current over the same line conductor and through the same electromagnet to ground imprints type face 41. Thus by means of impulse transmitted over line conductors 11 and 12 to the electromagnets (land 2) and (3 and 4) any type face of the group forming the printing symbol may be selectively recordedon the receiving tape, dependent upon which line conductor the impulse traverses and upon the polarity of the impulse.

A transmitting tape 24 a portion of which is shown in Fig. 5 is used to select the proper line conductor and polarity of impulse to correctly build up the impressions from the elemental type faces to form legible Eng- 113:,

lish characters. In the tape the perforations are spaced longitudinally along four transversely spaced rows 1b, 2, 3b and 4b, corresponding to the lines of contact between brush 9 and brushes 5 and 6 and brush 10 and brushes 7 and 8 respectively, thus a perforation in the tape on line 1b allows contact to be made between the positive terminal of grounded dynamo 22 through brush 5 and brush 9 and line conductor 11 to transmit a positive impulse of current through the helix of electromagnet (1 and 2) to ground, inducing a N. magnetic pole on pole piece 261 of electromagnet (1 and 2) and a S. magnet poleon pole face 262 which as heretofore explained herein records an impression of type face 11 upon the receiving tape 30. Similarly perforations in the tape 24 spaced longitudinally on the lines 2b, 3b and 4b operate type faces 22, 33 and 44 respectively.

It remains now to disclose the method of building up the impressions from the type faces to form legible characters.

Referring to Fig. 4 which illustrates the type faces as they are assembled in the receiver to form the printing symbol, it will be noted that the type faces 11, 22 and 33 are each in width equal to the width of a coInplete normal character such as H and that this width is divided into eight equal units, each of the type faces being separated from its adjacent type face by one of these units of width, to form the printing symbol.

The longitudinal spacing of thel perforatioiis in the transmitting tape 24 is dependent upon the ratio between the speed of the transmitting and receiving tapes and is such that while the receiving tape moves one unit of width or one-eighth of a complete normal character, the transmitting tape moves the distance between anyA two transverse lines as 23 and 13 on the tape.

The character A is transmitted and recoi'ded as follows: Conceive the transfitting tape 24 perforated as shown in Fig. 5 to move toward the left as viewed in the figure between the brushes 9, 10 and 5, (i, 7 and 8 of the transmitter Fig. 1 at a speed which allows one transverse spacing of the tape to pass the contact line of the brushes while the receiving tape 30 is being drawn from right to left under the type faces as viewed in Fig. 4, a distance equal to one unit or oneeighth of the width of a complete normal character, then a perforation in the transmitting tape spaced on the line 4b and on the transverse line 41 allows contact to be made between the brushes 8 and 10 to send a negative impulse of current over line conductor 12 through electromagnet (3 and 4) to ground which as hitherto explained records an impression of type face 44 on the receiving tape 30. After the transmitting tape has moved eight units and the receiv ing tape has moved the width of a normal character, a perforation in the transmitting tape spaced on the lines 4b and 43 again allows contact to be made between brushes 8 and 10 to send a negative impulse of current over line conductor 12 electromagnet (3 and 4) to ground to imprint type face 44 upon the receiving tape a distance away from the previous impression which is equal to the width of a complete normal character. Af- I ter the transmitting tape has moved two additional tape units a perforation in the tape on the lines 2b and 23 allows contact to be made between brushes 9 and 6 to send a negative impulse of current over line conductor 11 through electromagnet (1 and 2) to ground, to operate type face 22 to record its impression on the receiving tape. As the receiving tape has moved, since the last impression of type face 44, a distance of two units or one-quarter of the width of a normal character, this impression of type face 2g abuts at its two extremities the middle portions of both the previous impressions of type face 44. After the transmitting tape has moved an additional unit, during which time the receiving tape has also moved one unit or one-eighth of the width of a normal character, a perforation in the transmitting tape placed on the lines 1 and 13 allows a positive impulse of current to be sent over line conductor 11 through electromagnet (1 and 2) to ground to operate type face l1, the impression from which abuts at its right horizontal extremity the top of the last impression of type face 4* while the vertical leg of the imprint of the type face registers with the upper half of the iii-st impression 3i type face 44 to complete the character alphabet and the numerals from 0 to 9 may be built up and recorded as shown in Fig. 6. 1t will be observed from the foregoing that as the operation of the armature to effect the imprinting of a type face does not l" depend upon a reversal of the polarity induced therein by the polarizing magnet, the armatures and type faces may be formed of Similarly all of the characters of the either iron or steel and that they may be large or small.

As a resultant field is formed by the polarizing and electromagnetic component fields whenever a helix is energized and without any predetermined intensity of energization, of either polarizing iield, my

improved receiver, will operate through an extremely wide range of current intensity, thus producing a device of extreme sensibility, one that requires a minimum of adjustment to meet varying line conditions i and one that may be successfully used upon lines approaching the limits of commercial practicability.

Further the si mpliiication of reduction in q parte in my iinpreved receiver makes for a device Which-may be easily manufactured and is practically constant in operation.

While I have disclosed but one embodiment of my device, it is to be understood that I may make numerous changes in the details thereof, without departing from the spirit or narrowing the scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is as follows:

1. In printing telegraph receiver, a plurality of printing pens; a receiving surface therefor; magnetic means for restraining said pens from contact with said receiving surface and electromagnetic means associated with groups of said pens for selectively propelling any pen yof said group of pens to strike said receiving surface.

2. In a printing telegraph receiver, a `plurality of pivoted type-bearing members; a polarizing field common to all of said memw bers; yand electromagnetic means common to pairsA of saidv members and adapted to produce adjacent to any selected member of a pairof said `membersa magnetic field at an angle to -said polarizing field to cause said member to assume an operative position.

3.I In a printing telegraph receiver, a plurality of rotatably mounted pen members, a polarizing field adapted to maintain all of said vpen members normally in a predetermined position and electromagnetic means for creating another magnetic field adjacent to any selected pen member to cause s aid pen member to rotate to assume an operative position vdetermined by the resultant magnetic field of the two component fields.

4. In aprinting telegraph receiver, a plurality of printing pens, a receiving surface, a magnetic field common to all of said pens and adapted to restrain said pens from contact `with said receiving surface and electromagnetic means associated -vvith pairs of said pensfor creating adjacent to either pen ofy a pair of said pens another magnetic field to produce a resultant field wit-h saidv common field to cause said pen to strike said receiving surface.

5. In a printing telegraph receiver, a plurality of printing pens, a receiving surface therefor, a magnetic field common to all of said pens and adapted to restrain said pens from contact with said receiving surface and electromagnets associated with said pens for creating adjacent to any selected one of said pens .another magnetic field to produce a resultant` field with said common field to cause said pen to strike said receiving surface.

6. In a printing telegraph receiver, a receiving surface, a plurality of movable printing pens each adapted to produce on said receiving surface a mark constituting one` element of a letter or character; a polarizing field common to all of said printing pens and adapted to restrain said pens from contact with said receiving surface and electromagnets each controlling a pair of said pens and each of said magnets being adapted when energized to rotate either pen of its associated pair of pens to strike said receiving surface.

7. In a printing telegraph receiver, a receiving surface; a plurality of magnetic printing members; a polarizingfield common to all of said members and adapted to maintain said members out of contact with said receiving surface and electromagnets each controlling a pair of said printing members and adapted-when energized to cause either member of its associated pair of printing members, to attempt to assume a position coincident with the field resultant from the electromagnetic and polarizing component fields to bring said printing member into contact with said receiving surface.

8. In a receiver for use in printing telegraph systems, comprising a plurality of printing pens; a receiving surface; a magnetic field common to all of said pens and adapted to maintain said pens normally out of contact with said receiving surface; and electromagnetic means associating with groups of said pens whereby another magnetic field may be created adjacent to any selected pen of said group of pens and at an angle with said common magnetic field to cause said selected pen to move toward a position coincident with the resulta-nt field of the two component fields.

9. In a printing telegraph receiver, a plu- `ality of pivoted type-bearing members; a polarizing field common to all of said members, and electromagnetic pens common to pairs of said lnembers and adapted to produce adjacent to any selected member of a pair of said members a magnetic field at an angle to said polarizing field vto cause said member to move toward a position determined by the resultant field of the polarizing field and electromagnetic field.

l0. In a printing telegraph receiver, a plurality of rotatably mounted type-bearing members, a polarizing field common to all of said members and adapted to hold tho members normally in predetermined positions, and electromagnetic means common to pairs of said type-bearing members and adapted to create adjacent to any selected type-bearing member and at an angle to said polarizing field a magnetic field to cause said typesbearing member to move toward a position determined by the field resultant from said polarizing and said electromagnetic field.

'11. In a printing telegraph receiver, a plurality of rotatably mounted armatures, a printing type borne O11 one extremity of each of said armatures, a receiving surface, a polarizing field common to all of said armatures and adapted to hold said armatures normally in a predetermined position which restrains said type from contact with said receiving surface, and electromagnetic means common to pairs of said armatures and adapted to create adjacent to any se lected armature and at an angleto said polarizing field a magnetic field to cause said armature to move toward a position determined by the field resultant from said polarizing and said electromagnetic fields to bring the type borne by said armature into contact With said receiving surface.

12. In a printing telegraph receiver, a plurality of printing pens, a receiving surface therefor, magnetic means for restraining said pens from contact With said receiving surface, and a single electromagnet associated with a pair of pens for selectively propelling either pen to strike said receiving surface.

13. In a printing telegraph receiver, a permanent magnet, a plurality of pens pivoted upon one pole of said permanent mag net and approaching the other pole and an electromagnet for defiecting selective pairs.

14. In a printing telegraph receiver, a field magnet, two pens pivoted upon one pole of said field magnet and approaching the other pole, and a single electromagnet presenting one pole to each pen for defiecting either pen to an operative position.

15. In a printing telegraph receiver, a field magnet, a plurality of pens attached to one pole and held in a normal position by the attraction of the other pole of said field magnet, and electromagnets adjacent to said pens for defiecting them selectively into operative position.

16. The combination with tivo arms provided With printing pens, and magnetic means for holding the arms with the pens out of operative position, of an electromagnet having one pole adjacent to each arm, and means for sending electrical impulses through the magnet in opposite directions to operate the pens independently.

Signed by me at Toronto, county of York and Province of Ontario, in the presence of two Witnesses.

CHARLES G. ASHLEY.

Witnesses:

WM. J. HERDMAN, R. S. FULTON.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

